Intervention following alternative events is essential for continued cognitive development. Prior research has cognitive growth models and the effect of alternative stimuli on youth when given similar foundations. Following the return to school after a national pandemic and extended school closure following the COVID-19 outbreak of 2020, it is vital to determine factors to increase positive post-secondary outcomes for students. This research study examined the potential impact of student mental health on academic achievement in response to school closure following a pandemic. The research study consisted of 92 individual students and was a quasi-experimental quantitative study. Data consisted of two nominal independent variables and one scale dependent variable. The independent variables were participation in school based mental health or non-participation and the dependent variables were STAR 360 benchmark assessments in reading and math. Scaled Score and Normal Curve Equivalent were analyzed utilizing SPSS to calculate statistical significance within the data set. The data from this study indicated statistically significant growth in reading and math post-school closure as well as statistical significance in between all benchmark assessments in relation to time but no statistical significance due to school based mental health. The findings represent students who were presented with alternative stimuli and required intervention to return to commensurate cognitive growth. Following the pandemic closure, schools needed to develop additional levels of support that reconnected students to school and furthered social and emotional learning practices. Analysis of pre- and post-extended school closure data as well as the main effect of time in posttest analysis suggests that universal support over time may correlate to increased academic achievement and growth. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]